T-Nation supports the exchange of knowledge and fact, even on topics that the general public and "professionals" don't find popular. Are steriods illegal? Yep. Why are they illegal? Mainly due to a massive amount of misinformation, flat out lies, and negative public attitude.
Steriods can be dangerous if abused or used incorrectly. However, like any other drug, they can also be used effectively with little or no negative side effects. Many steriods, when used correctly, have less negative effects than many drugs used for treating arthritis or heart conditions.
T-Nation supports factual exchange on the issue, and the fact is that steriods can change your physique for the better and improve your health with minimal to no negative side effects if you are smart about it.
PS Why do you think your school would know anything about steriods? Unless those "professionals" that you talked to were professionals like Cy Wilson, why would you listen to them? Don't get opinions on the matter, get facts. Then make up your own mind.